CVE-2026-67328

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-01. A secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

@better-auth/sso versions before 1.6.21 contain multiple authentication bypass vulnerabilities in SSO provider handling that allow attackers to sign in as arbitrary users. Attackers can exploit domain verification parsing mismatches, orphaned provider accounts, unbound SAML assertions, or reflected XSS on logout endpoints to gain unauthorized session access and account takeover.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 1, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Aug 1, 2026
Patch available. Sources: github.
generic

@better-auth/sso before 1.6.21 Account Takeover via SSO | Advisories | VulnCheck

https://www.vulncheck.com/advisories/better-auth-sso-before-account-takeover-via-sso
github Patch Available

@better-auth/sso: account takeover via multiple SSO flaws · Advisory · better-auth/better-auth · GitHub

https://github.com/better-auth/better-auth/security/advisories/GHSA-prpr-5gj3-qqhg

Vendor Advisories for CVE-2026-67328(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 84× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 211 total refreshes for this CVE.

  1. 2026-10-04 23:48 UTCEG score recompute
  2. 2026-10-04 23:48 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 06:26 UTCEG score recompute
  5. 2026-10-04 06:26 UTCGHSA enrichment
  6. 2026-10-03 14:26 UTCEPSS rescore
  7. 2026-10-03 02:44 UTCEG score recompute
  8. 2026-10-03 02:44 UTCGHSA enrichment
  9. 2026-10-02 17:56 UTCEPSS rescore
  10. 2026-10-02 10:29 UTCEG score recompute
  11. 2026-10-02 10:29 UTCGHSA enrichment
  12. 2026-10-01 19:50 UTCEPSS rescore
  13. 2026-10-01 15:41 UTCGHSA enrichment
  14. 2026-10-01 02:43 UTCEG score recompute
  15. 2026-10-01 02:43 UTCGHSA enrichment
  16. 2026-09-30 15:03 UTCEPSS rescore
  17. 2026-09-29 06:47 UTCEG score recompute
  18. 2026-09-29 06:47 UTCGHSA enrichment
  19. 2026-09-28 13:52 UTCEPSS rescore
  20. 2026-09-28 07:17 UTCGHSA enrichment
  21. 2026-09-27 18:22 UTCEG score recompute
  22. 2026-09-27 18:22 UTCGHSA enrichment
  23. 2026-09-27 13:48 UTCEPSS rescore
  24. 2026-09-26 15:59 UTCEPSS rescore
  25. 2026-09-25 04:50 UTCEG score recompute
Show 75 more
  1. 2026-09-25 04:50 UTCGHSA enrichment
  2. 2026-09-24 12:53 UTCGHSA enrichment
  3. 2026-09-23 23:50 UTCEG score recompute
  4. 2026-09-23 23:50 UTCGHSA enrichment
  5. 2026-09-23 17:54 UTCEPSS rescore
  6. 2026-09-23 10:27 UTCGHSA enrichment
  7. 2026-09-22 21:32 UTCEG score recompute
  8. 2026-09-22 21:32 UTCGHSA enrichment
  9. 2026-09-22 07:06 UTCEG score recompute
  10. 2026-09-22 07:06 UTCGHSA enrichment
  11. 2026-09-20 20:59 UTCEG score recompute
  12. 2026-09-20 20:59 UTCGHSA enrichment
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-19 23:31 UTCEG score recompute
  15. 2026-09-19 23:31 UTCGHSA enrichment
  16. 2026-09-19 03:57 UTCEG score recompute
  17. 2026-09-19 03:57 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-18 14:51 UTCGHSA enrichment
  20. 2026-09-18 01:15 UTCEG score recompute
  21. 2026-09-18 01:15 UTCGHSA enrichment
  22. 2026-09-17 01:23 UTCEG score recompute
  23. 2026-09-17 01:23 UTCGHSA enrichment
  24. 2026-09-16 14:08 UTCEPSS rescore
  25. 2026-09-16 05:24 UTCEG score recompute
  26. 2026-09-16 05:24 UTCGHSA enrichment
  27. 2026-09-16 05:15 UTCEPSS rescore
  28. 2026-09-15 03:39 UTCEG score recompute
  29. 2026-09-15 03:38 UTCGHSA enrichment
  30. 2026-09-14 14:43 UTCGHSA enrichment
  31. 2026-09-14 01:35 UTCEG score recompute
  32. 2026-09-14 01:35 UTCGHSA enrichment
  33. 2026-09-13 12:40 UTCGHSA enrichment
  34. 2026-09-12 23:45 UTCEG score recompute
  35. 2026-09-12 23:45 UTCGHSA enrichment
  36. 2026-09-12 09:47 UTCGHSA enrichment
  37. 2026-09-11 20:52 UTCEG score recompute
  38. 2026-09-11 20:52 UTCGHSA enrichment
  39. 2026-09-11 14:53 UTCEPSS rescore
  40. 2026-09-11 09:37 UTCEPSS rescore
  41. 2026-09-11 07:44 UTCGHSA enrichment
  42. 2026-09-10 18:49 UTCEG score recompute
  43. 2026-09-10 18:49 UTCGHSA enrichment
  44. 2026-09-10 03:17 UTCGHSA enrichment
  45. 2026-09-09 09:59 UTCEG score recompute
  46. 2026-09-09 09:59 UTCGHSA enrichment
  47. 2026-09-08 22:01 UTCEPSS rescore
  48. 2026-09-08 21:04 UTCEG score recompute
  49. 2026-09-08 21:04 UTCGHSA enrichment
  50. 2026-09-07 19:17 UTCEG score recompute
  51. 2026-09-07 19:17 UTCGHSA enrichment
  52. 2026-09-07 16:01 UTCEPSS rescore
  53. 2026-09-06 20:45 UTCEG score recompute
  54. 2026-09-06 20:45 UTCGHSA enrichment
  55. 2026-09-06 13:47 UTCEPSS rescore
  56. 2026-09-06 07:38 UTCGHSA enrichment
  57. 2026-09-05 18:43 UTCEG score recompute
  58. 2026-09-05 18:43 UTCGHSA enrichment
  59. 2026-09-05 15:31 UTCEPSS rescore
  60. 2026-09-05 05:46 UTCGHSA enrichment
  61. 2026-09-04 16:51 UTCEG score recompute
  62. 2026-09-04 16:51 UTCGHSA enrichment
  63. 2026-09-04 05:07 UTCEPSS rescore
  64. 2026-09-04 03:39 UTCGHSA enrichment
  65. 2026-09-03 09:03 UTCEG score recompute
  66. 2026-09-03 09:03 UTCGHSA enrichment
  67. 2026-09-02 14:12 UTCEPSS rescore
  68. 2026-09-01 22:24 UTCEG score recompute
  69. 2026-09-01 22:24 UTCGHSA enrichment
  70. 2026-09-01 13:54 UTCEPSS rescore
  71. 2026-09-01 04:40 UTCEPSS rescore
  72. 2026-08-31 23:20 UTCEG score recompute
  73. 2026-08-31 23:20 UTCGHSA enrichment
  74. 2026-08-31 00:04 UTCEG score recompute
  75. 2026-08-31 00:04 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-67328?
CVE-2026-67328 is a high vulnerability published on August 1, 2026. @better-auth/sso versions before 1.6.21 contain multiple authentication bypass vulnerabilities in SSO provider handling that allow attackers to sign in as arbitrary users. Attackers can exploit domain verification parsing mismatches, orphaned provider accounts, unbound SAML assertions, or reflected…
When was CVE-2026-67328 disclosed?
CVE-2026-67328 was first published on August 1, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67328 actively exploited?
CVE-2026-67328 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67328?
CVE-2026-67328 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-67328?
A fix for CVE-2026-67328 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67328 are linked in the Vendor Advisories panel on this page.

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